On the mechanism of d-f energy-transfer in RuII/LnIII and OsII/LnIII dyads: Dexter-type energy-transfer over a distance of 20 Å (Articolo in rivista)

Type

• Articolo in rivista (Classe)
• Prodotto della ricerca (Classe)

Label

• On the mechanism of d-f energy-transfer in RuII/LnIII and OsII/LnIII dyads: Dexter-type energy-transfer over a distance of 20 Å (Articolo in rivista) (literal)

Anno

• 2008-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

• 10.1002/chem.200800600 (literal)

Alternative label

• T. Lazarides; D. Sykes; S. Faulkner; A. Barbieri; M. D. Ward (2008)
  On the mechanism of d-f energy-transfer in RuII/LnIII and OsII/LnIII dyads: Dexter-type energy-transfer over a distance of 20 Å
  in Chemistry - A European Journal
  (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

• T. Lazarides; D. Sykes; S. Faulkner; A. Barbieri; M. D. Ward (literal)

Pagina inizio

• 9389 (literal)

Pagina fine

• 9399 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

• 14 (literal)

Rivista

• Chemistry - A European Journal (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo

• 30 (literal)

Note

• ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• 1. Univ Sheffield, Dept Chem, Sheffield S3 7HF, S Yorkshire, England 2. Univ Manchester, Dept Chem, Manchester M13 9PL, Lancs, England 3. Ist ISOF CNR, I-40129 Bologna, Italy (literal)

Titolo

• On the mechanism of d-f energy-transfer in RuII/LnIII and OsII/LnIII dyads: Dexter-type energy-transfer over a distance of 20 Å (literal)

Abstract

• We have used time-resolved luminescence methods to study rates of photoinduced energy transfer (PEnT) from [M(biPY)(3)](2+) (M=Ru, Os) chromophores to Ln(III) ions with low-energy f-f states (Ln=Yb, Nd, Er) in d-f dyads in which the metal fragments are separated by a saturated -CH2CH2- spacer, a P-C6H4 spacer, or a p-(C6H4)(2) spacer. ne finding that clef PEnT is much faster across a conjugated P-C6H4 spacer than it is across a shorter CH2CH2 spacer points unequivocally to Dexter-type energy transfer, involving electronic coupling mediated by the bridging ligand orbitals (superexchange) as the dominant mechanism. Comparison of the distance dependence of the Ru -> Nd energy-transfer rate across different conjugated spacers [P-C6H4 or P-(C6H4)(2) groups] is also consistent with this mechanism. Observation of Ru -> Nd PEnT (as demonstrated by partial quenching of the Ru-II-based (MLCT)-M-3 emission (MLCT= metal-to-ligand charge transfer), and the growth of sensitised Nd-III-based emission at 1050nm) over approximately 20 angstrom by an exchange mechanism is a departure from the normal situation with lanthanides, in which long-range energy transfer often involves through-space Coulombic mechanisms. (literal)

Prodotto di

• Institute for organic syntheses and photoreactivity (ISOF) (Istituto)
• Materiali Avanzati per la COnversione di energia Luminosa (MACOL) (PM.P04.010.001) (Modulo)

Autore CNR

• ANDREA BARBIERI (Persona)

Insieme di parole chiave

• Parole chiave di "On the mechanism of d-f energy-transfer in RuII/LnIII and OsII/LnIII dyads: Dexter-type energy-transfer over a distance of 20 Å" (Insieme di parole chiave)

Incoming links:

Prodotto

• Institute for organic syntheses and photoreactivity (ISOF) (Istituto)
• Materiali Avanzati per la COnversione di energia Luminosa (MACOL) (PM.P04.010.001) (Modulo)

Autore CNR di

• ANDREA BARBIERI (Persona)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• Chemistry - A European Journal (Rivista)

Insieme di parole chiave di

• Parole chiave di "On the mechanism of d-f energy-transfer in RuII/LnIII and OsII/LnIII dyads: Dexter-type energy-transfer over a distance of 20 Å" (Insieme di parole chiave)